procyberian/gcc
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

tree-sra.c: Fix completely_scalarize for negative indices.

Browse source 
* tree-sra.c (completely_scalarize): Properly handle negative array
	indices using offset_int.

From-SVN: r229852
This commit is contained in:
Alan Lawrence 2015-11-06 13:48:32 +00:00 • committed by Alan Lawrence
parent f1aa4bb328
commit 55bf45c0f3
2 changed files with 22 additions and 10 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

5
gcc/ChangeLog
View file

@ -1,3 +1,8 @@
2015-11-06 Alan Lawrence <alan.lawrence@arm.com>
* tree-sra.c (completely_scalarize): Properly handle negative array
indices using offset_int.
2015-11-06 Richard Biener <rguenther@suse.de>
* alloc-pool.h (object_allocator::allocate): Default-initialize

27
gcc/tree-sra.c
View file

@ -999,18 +999,25 @@ completely_scalarize (tree base, tree decl_type, HOST_WIDE_INT offset, tree ref)
if (maxidx)
{
gcc_assert (TREE_CODE (maxidx) == INTEGER_CST);
/* MINIDX and MAXIDX are inclusive. Try to avoid overflow. */
unsigned HOST_WIDE_INT lenp1 = tree_to_shwi (maxidx)
- tree_to_shwi (minidx);
unsigned HOST_WIDE_INT idx = 0;
do
tree domain = TYPE_DOMAIN (decl_type);
/* MINIDX and MAXIDX are inclusive, and must be interpreted in
DOMAIN (e.g. signed int, whereas min/max may be size_int). */
offset_int idx = wi::to_offset (minidx);
offset_int max = wi::to_offset (maxidx);
if (!TYPE_UNSIGNED (domain))
{
tree nref = build4 (ARRAY_REF, elemtype, ref, size_int (idx),
NULL_TREE, NULL_TREE);
int el_off = offset + idx * el_size;
scalarize_elem (base, el_off, el_size, nref, elemtype);
idx = wi::sext (idx, TYPE_PRECISION (domain));
max = wi::sext (max, TYPE_PRECISION (domain));
}
for (int el_off = offset; wi::les_p (idx, max); ++idx)
{
tree nref = build4 (ARRAY_REF, elemtype,
ref,
wide_int_to_tree (domain, idx),
NULL_TREE, NULL_TREE);
scalarize_elem (base, el_off, el_size, nref, elemtype);
el_off += el_size;
}
while (++idx <= lenp1);
}
}
break;